China Mobile: In some provinces, the written test focuses on line test, personality test and enterprise cognition, while in some provinces, there are professional knowledge, including communication and marketing.

China Unicom: The written test is mainly based on line test, personality test and a little English, and some provinces have a little professional knowledge.

Colleges and universities mainly focus on comprehensive knowledge and professional knowledge, and will also take exams and apply for exams, which need to be subject to specific announcements.